| Orobanche minor | IE, VCH21 Co. Dublin, Rathcoole | | | 6/10/1931 | GALW |
| Orobanche minor | IE, VCH21 Co. Dublin, Rathcoole | | | 3/10/1931 | GALW |
| Orobanche minor | IE, VCH21 Co. Dublin, Rathcoole | | | 6/10/1931 | GALW |
| Orobanche minor | IE, VCH21 Co. Dublin, Rogerstown | | | 6/1931 | GALW |
| Osmunda regalis | IE, VCH27 West Mayo, Clare Island | | | 7/1903 | GALW |
| Osmunda regalis | IE, VCH33 Fermanagh, Correl Glen | | | 3/7/1903 | GALW |
| Persicaria hydropiper | IE, VCH20 Co. Wicklow, Newtown Mount Kennedy | | | 13/10/1931 | GALW |
| Plantago coronopus | IE, VCH12 Co. Wexford, Lady's Island | | | 30/8/1977 | GALW |
| Plantago media | IE, VCH7 South Tipperary, Mullinahone | | | 8/6/1964 | GALW |
| Polygonum aviculare | IE, VCH20 Co. Wicklow, Newtown Mount Kennedy | | | 13/10/1931 | GALW |
| Polygonum persicaria | IE, VCH20 Co. Wicklow, Newton Mount Kennedy | | | 13/10/1931 | GALW |
| Polypodium interjectum x cambricum = P. x shivasiae | IE, VCH20 Co. Wicklow, Glencree | | | 7/4/1988 | GALW |
| Polypodium vulgare | IE, VCH21 Co. Dublin, Seecaun Mountain | | | 23/10/1931 | GALW |
| Polypodium vulgare | IE, VCH21 Co. Dublin, Cot Brook | | | 24/9/1931 | GALW |
| Polystichum aculeatum | IE, VCH17 North-east Galway, Briar Hill | | | 5/7/1981 | GALW |
| Potentilla anserina | IE, VCH7 South Tipperary, Mullinahone | | | 8/6/1964 | GALW |
| Potentilla fruticosa | IE, VCH9 Co. Clare, Ballyvaughan | | | 7/1895 | GALW |
| Raphanus raphanistrum | IE, VCH38 Co. Down, Dundonald | | | 10/7/1885 | GALW |
| Salicornia europaea | IE, VCH21 Co. Dublin, North Bull Island | | | 5/7/1931 | GALW |
| Saxifraga stellaris | IE, VCH36 Tyrone, Dart Mountain | | | 23/8/1931 | GALW |
| Scutellaria minor | IE, VCH1 South Kerry, Killarney | | | 16/8/1963 | GALW |
| Selaginella selaginoides | IE, VCH21 Co. Dublin, Donabate | | | 7/1940 | GALW |
| Silene vulgaris | IE, VCH38 Co. Down, Orlock Point | | | 6/6/1885 | GALW |
| Sinapis arvensis | IE, VCH21 Co. Dublin, Shankill | | | 22/9/1981 | GALW |
| Sisymbrium officinale | IE, VCH21 Co. Dublin, Dublin | | | 8/1893 | GALW |
| Sisymbrium orientale | IE, VCH21 Co. Dublin, Fairview Strand | | | 25/6/1893 | GALW |
| Sisymbrium orientale | IE, VCH21 Co. Dublin, Dublin | | | 9/1903 | GALW |
| Sisymbrium orientale | IE, VCH21 Co. Dublin, Baldoyle | | | 30/8/1894 | GALW |
| Smyrnium olusatrum | IE, VCH21 Co. Dublin, Raheny | | | 6/1893 | GALW |
| Solanum dulcamara | IE, VCH3 West Cork, Clonakilty | | | 1953 | GALW |
| Spartina alterniflora | GB, VC11 South Hampshire, Southampton | | | 1850 | GALW |
| Spergularia rupicola | IE, VCH27 West Mayo, Cathedral Rocks | | | 21/7/1904 | GALW |
| Stachys palustris | IE, VCH26 East Mayo, Ballinrobe | | | | GALW |
| Symphytum officinale x asperum = S. x uplandicum | Castle Eyre | | | 1957 | GALW |
| Thalictrum minus | IE, VCH17 North-east Galway, Athenry | | | 3/7/1906 | GALW |
| Thelypteris palustris | IE, VCH30 Co. Cavan, Lough Oughter | | | 7/1940 | GALW |
| Thelypteris phegopteris | IE, VCH31,VCH38, Carlingford | | | 27/5/1944 | GALW |
| Trichomanes speciosum | IE, VCH3 West Cork | | | 1954 | GALW |
| Trifolium arvense | IE, VCH3 West Cork, Cape Clear | | | 1953 | GALW |
| Trifolium arvense | IE, VCH20 Co. Wicklow, Mizen Head | | | 30/8/1931 | GALW |